Human extraintestinal pathogenic Escherichia coli strains differ in prevalence of virulence factors, phylogroups, and bacteriocin determinants

Table 2 Detection of individual bacteriocin determinants in ExPEC and fecal bacteriocin producers within less virulent phylogenetic groups A + B1 compared to more virulent phylogroups B2 + D

Bacteriocin determinant^a	ExPEC strains	Fecal strains	P value^a	ExPEC strains	Fecal strains	P value
Bacteriocin determinant^a	A + B1 (n = 118) %	A + B1 (n = 455) %	P value^a	B2 + D (n = 289) %	B2 + D (n = 828) %	P value
Bacteriocinogeny	76 (64.4)	227 (49.9)	0.03	181 (62.6)	468 (56.5)	-
mM determinant^b	13 (17.1)	24 (10.6)	-	93 (51.4)	139 (29.7)	<0.01
mB17 determinant	4 (5.3)	19 (8.4)	-	10 (5.5)	66 (14.1)	<0.01
mC7 determinant	6 (7.9)	4 (1.8)	0.02	4 (2.2)	8 (1.7)	-

^aOnly statistically significant results are shown, for other results see Additional file 4: Table S4
^bBacteriocin determinants (mM, mB17, and mC7) of bacteriocinogenic E. coli isolates

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